Place a large saucepan coated with cooking spray over medium-high heat until hot. Add mushrooms; cover and cook 5 minutes or until mushrooms are tender. Add turkey and next 6 ingredients (turkey through broth); bring to a boil. Cover, reduce heat, and simmer 20 minutes. Remove from heat; stir in onions and chopped parsley.
Place flour in a small bowl, and gradually add milk, stirring constantly with a whisk until well-blended. Add milk mixture to mushroom mixture, and bring to a boil. Cook for 1 minute or until thick. Reduce heat; add rice and cream cheese, stirring until cheese melts. Garnish with parsley sprigs, if desired.